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In Reply to: RE: Another thing to consider.... posted by Michael Samra on June 23, 2016 at 20:22:28
Hi Mike one section of the 6sn7 will drive the power tube, so, only a 2 stage amp Each 6sn7 will therefore drive the 2 se amps that make up the push pull pair for the output trans. The circuit is located here;
http://rh-amps.blogspot.com/2013/05/rh-universal-v2-totally-universal.html
thank you for your interest.
Follow Ups:
I know you want to build a PP amp with the drivers being single ended for half of the cycle to feed each output tube..If you look tho,they are using the 12AU7 as a voltage gain amp driver and I thought you wanted to use a cathode follower driver..Their circuit has gain and this is where I am confused.You need to use half of each 6SN7 as a voltage amp and the other half as a driver..If you paralled the halves of the 6SN7,you are just going to end up with a lower impedance driver or voltage amp,depending on how you use it.
I heard a superb sounding Single Ended KT88 built by a guy named Kegger and it used Edcor iron and it was driving a pair of ADS 780s but it sounded much bigger than the 10 or 12 watts is was rated at.
"For every complex problem there is an answer that is clear, simple, and wrong" H. L. Mencken
There is no amp as such and i am trying to make one out of 2 of the single ended amps. Phase splitting will be done with a Lundahl input transformer and each mirror imaged signal will be handled by a se amp.
I have built 2 of these that are kt88 type and they sound excellent. So, i was thinking i would make a parallel single ended version to get the power up to 20 watts. Well, that's been done many times and i thought i have not read about anyone taking a se amp and using it as a basis for a push pull amp. So this is where i am now.
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